GM Service Manual Online
For 1990-2009 cars only
Table 1: Coolant Level Module - L65
Table 2: Coolant Level Switch - L65
Table 3: Engine Coolant Temperature (ECT) Gauge Sensor - L18
Table 4: Engine Coolant Temperature (ECT) Gauge Sensor - L65
Table 5: Engine Oil Pressure (EOP) Sensor - L18
Table 6: Engine Oil Pressure (EOP) Sensor and Fuel Pump Switch - L65
Table 7: Fuel Level Sensor - L65
Table 8: Fuel Pump and Sender - L18
Table 9: Instrument Panel Cluster

Coolant Level Module - L65


Object Number: 62420  Size: CH

Connector Part Information

    • 12004706
    • 6-Way P/C Edgeboard (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

39

Ignition 1 Voltage

B

--

--

Not Used

C

BLK

150

Ground

D

--

--

Not Used

E

YEL/BLK

68

Low Coolant Level Indicator Control

F

LT GRN

1478

Coolant Level Switch Signal

Coolant Level Switch - L65


Object Number: 635009  Size: CH

Connector Part Information

    • 12052641
    • 2-Way F Metri-pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1478

Coolant Level Switch Signal

B

BLK

150

Ground

Engine Coolant Temperature (ECT) Gauge Sensor - L18


Object Number: 684807  Size: CH

Connector Part Information

    • 12110293
    • 3-Way F Metri-pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

720

Low Reference

B

YEL

410

ECT Sensor Signal

C

DK GRN

35

Coolant Temperature Indicator Control

Engine Coolant Temperature (ECT) Gauge Sensor - L65


Object Number: 333039  Size: CH

Connector Part Information

    • 12089499
    • 2-Way F Metri-pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

35

Coolant Temperature Indicator Control

B

--

--

Not Used

Engine Oil Pressure (EOP) Sensor - L18


Object Number: 516595  Size: CH

Connector Part Information

    • 12065299
    • 4-Way F Metri-pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN

31

Engine Oil Pressure Indicator Control

B-D

--

--

Not Used

Engine Oil Pressure (EOP) Sensor and Fuel Pump Switch - L65


Object Number: 39663  Size: CH

Connector Part Information

    • 12065401
    • 4-Way F Metri-pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN

31

Engine Oil Pressure Indicator Control

B

--

--

Not Used

C

GRY

120

Fuel Pump Supply Voltage

D

ORN

440

Battery Positive Voltage

Fuel Level Sensor - L65


Object Number: 258174  Size: CH

Connector Part Information

    • 12010973
    • 2-Way M Weather-pack Type SHD (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

451

Ground

B

PPL

30

Fuel Level Signal

Fuel Pump and Sender - L18


Object Number: 518981  Size: CH

Connector Part Information

    • 12160482
    • 3-Way F Metri-pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

1589

Fuel Level Sensor Signal [-Primary]

B

GRY

120

Fuel Pump Supply Voltage

C

BLK

150

Ground

D

BLK

470

Low Reference

Instrument Panel Cluster


Object Number: 39791  Size: CH

Connector Part Information

    • 12146397
    • 32-Way P/C BOW P2S (BLK)

Pin

Wire Color

Circuit No.

Function

1

BRN

358

Air Bag Indicator Control (L65 A/T, not used)

2

--

--

Not Used

3

LT BLU

14

Left Front Turn Signal Lamps Supply Voltage

4

BLK/WHT

451

Ground

5

LT GRN

11

Headlamp High Beam Supply Voltage

6

WHT

121

Engine Speed Signal

7

PNK

39

Ignition 1 Voltage - M/T

7

PNK

1020

Off/Run/Crank Voltage - A/T

8

PPL/WHT

1382

LED Dimming Signal

9

BLK/WHT

771

Transmission Range Switch Signal A - A/T

10

GRY

773

Transmission Range Switch Signal C - A/T

11

YEL

772

Transmission Range Switch Signal B - A/T

12

WHT

776

Transmission Range Switch Signal P - A/T

13

DK GRN

35

Coolant Temperature Indicator Control - L65

14

DK GRN

389

Vehicle Speed Signal - L65

14

DK GRN/WHT

817

VSS Signal - L18

15

TAN

31

Oil Pressure Indicator Control

16

PPL

30

Fuel Level Signal

17

LT GRN/BLK

592

DRL Relay Control

18

YEL/BLK

508

Water In Fuel Indicator Control - L65

19

BRN

25

Charge Indicator Control

20

DK BLU

507

Wait To Start Indicator Control - L65

21

WHT/BLK

176

Service Throttle Soon Indicator Control - L65

22

PNK

39

Ignition 1 Voltage

23

BRN/WHT

419

MIL Control

24

WHT/BLK

499

Reduced Engine Power Indicator Control - L18

25

YEL/BLK

68

Low Coolant Level Indicator Control - L65

26

YEL

749

Security Indicator Control

27

LT GRN

867

ABS Indicator Failure Control

28

TAN/WHT

33

Brake Warning Indicator Control

29

GRY

8

Instrument Panel Lamp Supply Voltage - 1

30

YEL

234

Seat Belt Indicator Control

31

BLK/WHT

451

Ground

32

DK BLU

15

Right Front Turn Signal Lamps Supply Voltage